Power Ground Water Pen Sticks on ferrous surfaces (steel

Sticks on ferrous surfaces (steel doors etc)

Ceramic Bearings

click to release the magnet + bypass the latch

but easy to open post

Power Ground Water Pen Sticks on ferrous surfaces (steelA series of printed circuit boards [PCBs] weave a narrative from the fundamentals of electronics, to the transistor, logic gates, computational building blocks to a programmable micro controller. A series of "physical lecture notes" present a low level entry point into the material of electronics. This perspective is usually reserved for engineers, and obfuscated within the sealed boxes of our phones and computers. Here we consider the material of